I've read A God In Ruins and The Paying Guests and enjoyed both. Have you read Life After Life? If not then recommend reading that before A God In Ruins. My order of preference would be A God In Ruins followed by The Paying Guests, and then onto I Am Pilgrim (which is sitting in my tbr pile ) Hope you enjoy them. I'm a total fan of Sarah Waters now, ever since reading Fingersmith (which is brilliant), and have Tipping The Velvet lined up to listen to on audio book soon.

I've read the Paying Guests and I am Pilgrim from your choices. I really enjoyed the Paying Guests, flew through it, was a really good read. I loved I am Pilgrim, really loved it - I bought it for my Dad on a recommendation from a MNetter. He was recovering from major surgery and wanted something engrossing but not pretentious or navel gazery. It fitted the bill . We both sat up like eejits in the hospital fighting over who got to read it!

Personal opinion is that I Am Pilgrim is a bit of a sunlounger book (lots of plot but a bit silly) whereas the other two are curl-up-on-a-wet-night treats So depends on your mood (and yy read Life After Life first)